package com.hkbigdata.transform;

import com.hkbigdata.bean.WaterSensor;
import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.java.functions.KeySelector;
import org.apache.flink.streaming.api.datastream.KeyedStream;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;

import java.util.Arrays;
import java.util.List;

/**
 * @author liuanbo
 * @creat 2024-04-11-15:51
 * @see 2194550857@qq.com
 */
public class Flink09_TransForm_Reduce_Anonymous {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(1);


        List<WaterSensor> waterSensors = Arrays.asList(
                new WaterSensor("ws_001", 1607527992000L, 20),
                new WaterSensor("ws_001", 1607527992001L, 22),
                new WaterSensor("ws_001", 1607527992002L, 33),
                new WaterSensor("ws_002", 1607527992003L, 44),
                new WaterSensor("ws_002", 1607527992004L, 22),
                new WaterSensor("ws_002", 1607527992001L, 50)
        );

        KeyedStream<WaterSensor, String> waterSensorStringKeyedStream = env.fromCollection(waterSensors)
                .keyBy(new KeySelector<WaterSensor, String>() {
                    @Override
                    public String getKey(WaterSensor value) throws Exception {
                        return value.getId();
                    }
                });

/*        waterSensorStringKeyedStream.reduce(new ReduceFunction<WaterSensor>() {
            @Override
            public WaterSensor reduce(WaterSensor value1, WaterSensor value2) throws Exception {

                return new WaterSensor(value1.getId(), value1.getTs(), value1.getVc() + value2.getVc());
            }
        }).print();*/


        SingleOutputStreamOperator<WaterSensor> reduce = waterSensorStringKeyedStream.reduce((data1, data2) -> {
            return new WaterSensor(data1.getId(), data1.getTs(), data1.getVc() + data2.getVc());
        });
        reduce.print();


        env.execute();


    }
}
